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Recent questions tagged objective
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objective c - iOS: CGImageCreateWith[PNG or JPEG]DataProvider causes segmentation fault
I'm facing a weird problem. I'm developing an iOS command line barcode scanner utility using libzbar (yes, this ... and CGImage just like this. See Question&Answers more detail:os...
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Oct 24, 2021
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933
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objective c - Variable interpolation inside printf-style formatting functions
Is there a way to pass a variable for the floating point precision parameter in printf-style string formatting functions ... can this be done? See Question&Answers more detail:os...
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Oct 24, 2021
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1.4k
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objective c - Multiple methods named "count" found with mismatched result, parameter type or attributes
Since the update to Xcode 5.1 I can't archive my project any more. Xcode always says "Multiple methods ... NSDictionary. Whats wrong with this? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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820
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objective c - Running a Cocoa GUI in a non-main thread
I am having a gui/threading related problem in developing a cocoa user interface. The application is designed ... shouldKeepRunning = NO; } See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
votes
789
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1
answer
objective c - Is there a way to differentiate between left and right Shift keys being pressed?
I can recognize when the user presses any Shift key with this code: -(void)flagsChanged:(NSEvent *)theEvent { ... Shift key that was pressed? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
0
votes
728
views
1
answer
objective c - Communication between two applications
Is it possible to communicate between two different applications, one running in background and the other in ... can anyone suggest how? See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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71.8m
points)
objective
0
votes
639
views
1
answer
objective c - Adding Core Data to an existing iPhone app
I have started my application and now I want to add Core Data to my app. How can I add it? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
627
views
1
answer
objective c - How to use Core Data models without saving them?
I'm writing an application and I am using MagicalRecord as a framework for interacting with Core Data. The application ... How can I solve this? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
votes
863
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answer
objective c - Why are these two NSString pointers the same?
When I alloc and init two NSString variables and compare their pointers, they are the same. Here's a snippet that ... are s1 and s2 the same? See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
0
votes
764
views
1
answer
objective c - Literal @YES not working in iOS 5 / Xcode 4.4
New Xcode 4.4 is out and it should support literals like @42 @"String" @23.0L @{ @"key" : obj } and ... why it isn't working as expected. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
0
votes
849
views
1
answer
objective c - Does the result of CGImageGetColorSpace(image) have to be released?
I'm scaling a CGImageRef. I found various code examples on the web that begin like so: CGColorSpaceRef ... when releasing that CGColorSpaceRef? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
0
votes
808
views
1
answer
objective c - Open Link to Instagram Native
To open a Facebook Native profile, I can use: NSURL *url = [NSURL URLWithString:@"fb://profile/<id>"]; ... same thing for an Instagram profile? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
0
votes
855
views
1
answer
objective c - iOS remove word from UITextView
Suppose, I have a string in a UITextView that is : NSString *str = @"Hello world. What @are you @doing ?" When I ... word ? How can I do that? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
682
views
1
answer
objective c - Detect transparent part on the sprite in cocos2d?
I'm beginner in Cocos2d. I have a sprite, and I want to ignore touch on transparent area of that sprite. ... helpfull? Thanks a lot in advance. See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
735
views
1
answer
objective c - QuickLook consumer as a delegate from an NSViewController
I am having some problems implementing QuickLook functionality from a table in an NSView. The limited documentation on ... :-) Thanks Peter. See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
(
71.8m
points)
objective
0
votes
815
views
1
answer
objective c - Dismiss two modal view controllers
I have a navigation controller which present one modal viewController. From inside this modal viewController I present ... ? Appreciate, Alex. See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
(
71.8m
points)
objective
0
votes
984
views
1
answer
objective c - CVMetalTextureCacheCreateTextureFromImage returns -6660 on macOS 10.13
I'm recording the screen from my iPhone device to my Mac. As a preview layer, I am collecting sample buffers ... any ideas how to overcome this? See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
731
views
1
answer
objective c - Does Cocoa Touch have a search tree data structure?
I've been looking into this on Google and read the Collections entry in the SDK documentation, and turned up nothing ... 's still gnawing at me. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
867
views
1
answer
objective c - iOS debugging real device with printf
In Xcode Organizer, Console - I can read the NSLog output, but not printf(). Is this possible to read printf( ... , the same like in simulator? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
(
71.8m
points)
objective
0
votes
731
views
1
answer
objective c - iPhone : Difference between nil vs Nil and true vs TRUE
What is difference between nil and Nil in iOS development? And similarly what is difference between true and TRUE in iOS development? See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
(
71.8m
points)
objective
0
votes
886
views
1
answer
objective c - How to define which button pressed if they both have same IBAction?
I have two UIButtons (I create them using IB), which connected to File's owner with the same IBAction, how ... define which of them are pressed? See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
712
views
1
answer
objective c - How do you change a plist's root object type to NSArray in Xcode 4
how do you change the root object type to an NSArray in a plist created in Xcode 4? It defaults to a type of ... 't find a way to change it. See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
(
71.8m
points)
objective
0
votes
669
views
1
answer
objective c - dot syntax vs method syntax with getter=
I'm not sure how much use this question is but it seems interesting to me... I thought that using ... compile time like some answers suggest? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
838
views
1
answer
objective c - Defining a property in iOS class extension
I would like to add a property to UITableView in a Class Extension: @interface UITableViewController () @property ... be accessed by subclasses? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
1.1k
views
1
answer
objective c - What's the difference between "pi" and "M_PI" in objc
Including some math in my code I stumbled over the constant "PI". At least in my Xcode version 4.6 I could ... little bit tight on that topic. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
objective
0
votes
881
views
1
answer
objective c - integer constant does 'not reduce to an integer'
I use this code to set my constants // Constants.h extern NSInteger const KNameIndex; // Constants.m NSInteger ... what might be messed up? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
668
views
1
answer
objective c - What does the "strong" keyword do
I downloaded the Xcode 4.2 developer preview version and I created a cocoa application. But I found a very ... compile it. Thanks in advance! See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
1.1k
views
1
answer
objective c - adding click action to NSTextField
How do I attach a event to a NSTextField for when I click on it? Are there any examples out there? See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
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